CN213085585U

CN213085585U - Membrane bioreactor

Info

Publication number: CN213085585U
Application number: CN202020456128.XU
Authority: CN
Inventors: 陈福泰; 张桂英; 褚永前; 王琼
Original assignee: Beijing Qingdaduohua Environmental Technology Co ltd; Go Higher Environment Group Co ltd
Current assignee: Beijing Qingdaduohua Environmental Technology Co ltd; Go Higher Environment Group Co ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2021-04-30
Anticipated expiration: 2030-04-01

Abstract

The utility model discloses a membrane bioreactor. The utility model comprises a plurality of shuttlecock bodies arranged on a membrane bioreactor body, wherein each shuttlecock body comprises a fixed shaft, a brush body and a rotating piece; the bristle body is connected to the fixed shaft; the rotating member is provided on the fixed shaft for freely swinging and rotating the bristle body. The utility model also comprises a suspension body and a plurality of filaments which provide buoyancy and movement support for the suspension body. The membrane bioreactor in the utility model has the advantages of long operation period, light membrane pollution and good denitrification and dephosphorization effect. When the aeration quantity is reduced, the membrane bioreactor still keeps a good turbulent state, further strengthens the oxygen mass transfer and energy transfer processes, and reduces the problem of membrane pollution caused by over concentrated pollutant distribution; meanwhile, the problem that sludge flocs are damaged due to high aeration strength can be reduced, and the membrane replacement cost after membrane pollution or membrane damage is greatly saved.

Description

Membrane bioreactor

Technical Field

The utility model relates to a water treatment field, concretely relates to membrane bioreactor who uses in the water treatment.

Background

A Membrane Bioreactor (MBR) is used as a novel sewage treatment mode, membrane separation and biological treatment technologies are organically combined, and a secondary sedimentation tank in a traditional activated sludge process (CAS) is replaced, so that the sludge-water separation efficiency is improved. Compared with CAS, MBR has the advantages of good effluent quality, small land occupation, low sludge yield and the like. MBR among the prior art is divided into split type, integral type and combined type three kinds, and wherein, combined type MBR is based on the integral type structure installs the filler additional in membrane bioreactor, and has the membrane module in the membrane bioreactor, and the guide rail board is installed on the membrane module. In this combined type MBR, pack on the one hand and provide the carrier for the microorganism, reduce activated sludge's concentration, reduce the viscosity of mixed liquid, improve the characteristic of mixed liquid, on the other hand through the friction effect on pack and membrane surface and the shearing action of rivers, prevent and reduce the suspended solid and form the filter cake layer on the membrane surface, slow down and control membrane pollution.

After the existing composite MBR treats sewage for a period of time, the pump needs to be stopped to take out the membrane module for cleaning and replacement, the cleaning and replacement operations are troublesome, and the suction pump in the composite MBR needs to be stopped in the cleaning and replacement process. CN 110314553A discloses a washing membrane brush and a washing device of MBR flat membrane, and by adding the washing membrane brush into the composite MBR, the washing effect on the membrane surface of the flat membrane is enhanced, the membrane flux of the flat membrane is ensured, and the energy consumption is effectively reduced. However, the function of the structure is difficult to realize, and especially when the distance between adjacent flat membrane sheets is small, the cleaning membrane brush is difficult to play a role.

Disclosure of Invention

The to-be-solved technical problem of the utility model lies in: the prior membrane bioreactor has the problems of short operation period of membrane components, serious membrane pollution, high aeration energy consumption and poor denitrification and dephosphorization effect; the utility model provides a solve a membrane bioreactor of above-mentioned problem.

A membrane bioreactor comprises a plurality of shuttlecock bodies arranged on a membrane bioreactor body, wherein each shuttlecock body comprises a fixed shaft, a brush body and a rotating piece; the bristle body is connected to the fixed shaft; the rotating member is provided on the fixed shaft for freely swinging and rotating the bristle body.

The rotating brush body is like a flying shuttlecock, so the shuttlecock is called as a flying shuttlecock body. The shuttlecock body enables pollutants and water around the membrane bioreactor to be uniformly distributed, and also enables pollutants and a gel layer on the surface of a filtering membrane to be stripped, so that the problem of membrane pollution caused by local aggregation of pollutants and sludge is effectively solved, the risk of membrane pollution is greatly reduced, the membrane cleaning period is prolonged, and the effluent quality and the capacity of resisting the hydraulic load and the pollutant load of the membrane bioreactor are improved.

The rotating part comprises two rotating bodies, wherein one rotating body is provided with a spherical cavity, and the other rotating body is provided with a sphere matched with the spherical cavity.

The brush body is connected with one end of a fixed shaft through a rotating piece, and the other end of the fixed shaft is fixed on the membrane bioreactor body; one of the rotating bodies of the rotating part is fixed with the fixed shaft, and the other rotating body of the rotating part is fixed with the bristle body;

or the bristle body is directly fixed on a fixed shaft, and the fixed shaft is fixed on the membrane bioreactor body through a rotating piece; one of the rotating bodies of the rotating piece is fixed with the fixed shaft, and the other rotating body of the rotating piece is fixed with the membrane bioreactor body. The central axis of the bristle body is parallel to the plane where the guide rail plate of the membrane bioreactor body is located;

the shuttlecock body is connected with a motor, a motor connecting piece is arranged on the fixed shaft, the motor connecting piece is a clamping groove arranged on the fixed shaft, and the motor connecting piece is connected with a rotating shaft of the motor; the central axis of the bristle body is parallel to the plane of the guide rail plate of the membrane bioreactor body.

The membrane bioreactor comprises a membrane bioreactor body, wherein the membrane bioreactor body is provided with a plurality of bristles, the bristles are arranged on the membrane bioreactor body, the bristles are arranged on the fixed shaft, one end of each bristle is connected to the fixed shaft, the other end of each bristle is a free end, each bristle is of a sheet structure, the edge of each bristle is of a zigzag structure, the width of the edge of each bristle is 2-20mm, the length of the axis direction of each bristle is 1/10-1/20 of the length of a membrane module in the membrane bioreactor body, the maximum width of each bristle is 0.5-100 mm in the direction vertical to the axis direction of each. The bristle body is composed of a fluorine-containing polymer material, and the fixed shaft is composed of silica gel or plastic or ABS or stainless steel or other metals. A plurality of shuttlecocks are fixed on a guide rail plate or a membrane component of the membrane bioreactor body; the distance between two adjacent shuttlecocks is 100-600 mm, the distance between two adjacent shuttlecocks is 300-1500mm, and each membrane bioreactor body can be provided with 3-100 rows of shuttlecocks. When a plurality of shuttlecock bodies are fixed on the guide rail plate of the membrane bioreactor body, the shuttlecock bodies are arranged in a row along the center line of the guide rail plate.

The shuttlecock body is additionally arranged on the membrane biomembrane bioreactor body, the specific structure of the shuttlecock body is optimized, and the shuttlecock body comprises a fixed shaft, a brush body and a rotating piece; the rotating element is used for enabling the bristle body to swing and rotate freely or rotate directionally under the action of current, namely, under the action of hydraulic impact or current, the bristle body can realize the functions of 360-degree rotation, stretching and shaking around the central axis. The size of the shuttlecock body can be set to be smaller, and the hydraulic shearing and cleaning effects can be fully exerted even if the distance between adjacent membranes is smaller. Specifically, the shuttlecock can regularly rotate and swing under the combined action of energy gradient and a motor by utilizing the turbulent flow effect and hydraulic energy in the membrane bioreactor body, thereby effectively reducing the sludge deposition effect around the membrane bioreactor body and at the edge of the membrane component, slowing down the membrane pollution problem, prolonging the cleaning period of the membrane component, reducing the operation cost and improving the use efficiency of the membrane bioreactor; meanwhile, the problems of poor fluidity of the local water body of the reactor and poor mass transfer effect are effectively avoided.

The shuttlecock is characterized in that a micro motor and a circuit are arranged inside the shuttlecock body, the circuit of the shuttlecock body is linked with a circuit of an aeration fan contained in a membrane bioreactor body, the technology in the patent CN209657108U is specially cited, and a control circuit for linking eight stepping motors can simultaneously control the forward and reverse running speeds of the eight motors through computer software and limit setting of control software or hardware; when the circuit of the shuttlecock body is switched on, the shuttlecock body rotates and swings in a set direction; when the circuit of the shuttlecock body is closed, the brush body swings and rotates freely along with the surrounding water flow; carrying out thin film biological reactor on the membrane bioreactor body, wherein the air volume range of an aeration fan on the membrane bioreactor body is 1-100 m/min, the pressure range of the aeration fan is 20-100kPa, and the power range of the aeration fan is 5-100 kW; the power range of a motor arranged inside the shuttlecock body is 1-1000W, and the number of bristles on the bristle body is 1-20; the shuttlecock bodies positioned on the same row are connected by adopting a series circuit, the shuttlecock bodies positioned on different rows are connected by adopting a parallel circuit, the rotating direction of the shuttlecock bodies is adapted to the flow state of water, and the rotating directions of all the shuttlecock bodies are designed according to the clockwise or anticlockwise direction. The wavelength formed by the rotation of the shuttlecock is determined by the rotation speed of the pump and the alternating current frequency, the width of the gap between the guide rail plates is less than or equal to the wavelength value, and the range of the distance between the two adjacent guide rail plates is 5-20 mm.

The flow state of the water body in the activated sludge tank is determined by measuring actual flow speed and water quality parameters, and meanwhile, numerical simulation is carried out by using Computational Fluid Dynamics (CFD) software Fluent, so that the real flow state of the water body is more intuitively displayed. Among them, Computational Fluid Dynamics (CFD) is a branch of fluid dynamics, and is a rapidly developing discipline. The flow information of the fluid under specific conditions is obtained through computer simulation, so that the process of replacing test operation with computer calculation is realized, and an efficient actual working condition numerical simulation research approach is provided under the condition that engineering technicians are inconvenient to carry out test research. At present, the method is widely applied to the fields of heat energy power, civil engineering and water conservancy, fluid machinery, environmental engineering and the like. The existing CFD software packages are more, such as Phoenics, CFX, Fluent, Start-CD and the like, wherein Fluent is popular internationally at present.

The selection of the hydraulic calculation model is the core of flow field simulation, and the selection is mainly based on the Reynolds number of water flow in a simulation object. For a reaction tank of an activated sludge system, the inlet water Reynolds number is large and belongs to turbulent flow, so a RNGk-epsilon dual-equation turbulence model is selected as a hydraulic model, and the model introduces the turbulent dissipation rate epsilon on the basis of a single-pass model. The RNGk-epsilon model mainly aims at a flow field model of high Reynolds number water flow, but for the problem of low Reynolds number, the RNGk-epsilon model can reasonably solve the problem by setting a proper wall function and boundary layer grids.

Actual measurement and Fluent simulation results show that the flow state of the water body in the activated sludge tank is divided into different areas according to the positions, and the flow state of the different areas is influenced by factors such as inlet flow velocity, the action of an aeration fan, the tank wall, the Reynolds number of inflow water, the flow direction and the like and respectively belongs to different turbulent flows or laminar flows. In the water body around the membrane bioreactor, because the Reynolds number is larger and belongs to turbulent flow, the water flow direction is counter-clockwise or clockwise backflow which alternately occurs in a reciprocating way. Therefore, when the rotating direction of the shuttlecock is adapted to the flow state of the water body, the rotating directions of all the shuttlecocks are designed according to the clockwise or anticlockwise direction, and the aim is to utilize the kinetic energy of the shuttlecock to generate a strong shearing action. When the circuit is switched on, the shuttlecock body rotates rapidly and vibrates according to the set direction. When the bristle bodies which are arranged in parallel in the same row rotate rapidly in water, the turbulence of the surrounding water body is intensified to form vortex and flying flow, the rotation potential energy and the vibration kinetic energy generated by the water flow form instant strong jet flow and shock wave when impacting the membrane module, the shock wave can be diffracted into the water body in the middle of the membrane element and around the reactor, and the pollutant and the gel layer on the surface of the filter membrane are continuously peeled off by the shearing action caused by the jet flow. When the circuit is closed, the bristle body is free to oscillate and rotate with the surrounding water flow. The utility model discloses in this micro motor setting on the fixed axle, and the motor shaft and the rotation axis of motor are connected.

The shuttlecock body is fixed outside the guide rail plate and is placed into the MBR reactor together with the membrane component, and the brush hair and the fixed shaft of the shuttlecock body can freely swing and rotate for 360 degrees only by a small amount of water flow pushing action or current action, so that turbulent motion around the membrane component is strengthened, and the shuttlecock body is helpful for relieving the membrane surface pollution and blockage caused by laminar motion and uneven pollutant distribution.

The membrane bioreactor body is also provided with a suspended filler; the suspension filler comprises a suspension body and a plurality of filaments; one end of the filament is arranged on the outer wall of the suspension body, and the other end of the filament is a free end; the filaments are used to provide buoyancy and motion support to the suspension.

Further, the suspension filler comprises a suspension and a filament; by arranging the filament on the suspension, buoyancy and motion support can be provided for the suspension, so that the suspension floats and moves freely in the MBR; the energy consumption of aeration can be replaced by fully utilizing hydraulic energy and energy gradient, and the self inertia is used for maintaining the mass transfer motion between the activated sludge and the wastewater, so that the energy consumption of aeration is effectively reduced, and the denitrification and dephosphorization effects are enhanced. Specifically, the filament moves along with the movement of water flow, and the suspension body still has a better flowing state under the condition of less aeration amount, so that the oxygen mass transfer is increased, and the aeration energy consumption is reduced; and moreover, the shuttlecock is combined with the shuttlecock body, so that the mass transfer effect is greatly improved, and the sewage treatment effect is obviously improved. Meanwhile, under the condition of high aeration rate, the conventional hard filler destroys sludge flocs in the flowing process to generate a large amount of micro suspension, and the micro suspension is easy to deposit in membrane pores to cause irreversible membrane pollution; the utility model discloses an increase the destroyed degree of mud floc when the filament structure alleviates high aeration volume, greatly practice thrift the membrane cost of trading after being polluted, the effect is showing.

The suspension body is internally provided with a curved flow passage, one end of the curved flow passage is a closed end, the other end of the curved flow passage is an open end, and the open end is a water inlet and a water outlet; the water inlet and the water outlet are positioned on the outer wall of the shell of the suspension body.

The inner diameter of the curved flow passage is gradually increased from the closed end to the open end.

The central axis of the curved flow passage is a spiral line.

The spiral lines are located on the same plane.

The filament is arranged around the outer wall of the suspension body for one circle, and a plane formed by the filament around the outer wall of the suspension body for one circle is parallel to a plane where the spiral line is located.

And the curved flow passage is internally provided with a partition board which divides the curved flow passage into a plurality of bearing cavities, and the bearing cavities are used for bearing activated sludge.

The height of the partition plate is 1/2-5/6 of the height of the curved flow passage at the corresponding position.

The shell comprises a lower base body and an upper cover body; the lower base body and the upper cover body are buckled through the buckling pieces to form a curved flow passage in the shell.

The utility model discloses in the suspension is packed the structure that has optimized the suspensoid, set the axis of the curved runner in the suspensoid into the helix, curved runner is helical structure promptly, the diameter of spiral curved runner is crescent from the blind end to the open end simultaneously, and combine the setting of baffle, can breed and the metabolism provides the bearing space for activated sludge in the suspensoid is inside more effective, and at the inside miniature "oxygen deficiency" or "anaerobism" environment of formation of spiral, be favorable to nitrobacteria and the growth that removes phosphorus bacteria, nitrogen removal and dephosphorization effect have been reinforceed. The filament body is formed by connecting a plurality of gap pipes end to end through connecting bodies, the diameter of each gap pipe is 1-10 mm, the length of each gap pipe is 5-100 mm, and the length of each connecting body between every two adjacent gap pipes is 10-100 mm; the connector is made of one or more of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene and polyethylene terephthalate.

The suspension is made of ABS or PET or fluorine-containing polymer material; the size of the suspension body is 10-100 mm in length range and 10-100 mm in width range; the circular diameter range of the cross section of the suspension body is 5-50 mm, namely the size range of the curved flow channel is 5-50 mm. The suspension or/and the filament is provided with air holes to enable the suspension or/and the filament to float in water, the air holes are filled with gases such as oxygen, carbon dioxide, nitrogen and the like, and the air holes in the filament comprise pores in the interstitial tube.

Furthermore, the suspended filler optimizes the size, material and density of the filament and the suspension, the filament covers the surface of the suspension, and the suspended filler has the advantages of light weight, toughness, slight elasticity, waterproofness, protection of the suspension and sludge in the suspension, heat preservation and suspension. The filament contains the gap pipe, the diameter of the gap pipe is about 1-10 mm, the length is about 5-100 mm, the gap pipe interval is 10-100 mm, every two gap pipes are connected by adopting the connector, simultaneously, the size of the suspension body, the size of the curved flow channel and the optimization of the material density of the filament and the suspension body are combined by the optimization of the material of the suspension body and the connector, the filament and the suspension body can float in water, the kinetic energy of larger free movement can be effectively provided for the suspension body, and the filament and the suspension body are combined with the shuttlecock flying body which swings for a long time and a large amplitude, the mass transfer effect between activated sludge and water is obviously improved, and the efficiency and the effect of sewage treatment are further improved. The membrane bioreactor body in the utility model is a flat-plate MBR reactor, a hollow fiber MBR reactor, a tubular MBR reactor or a ceramic membrane MBR reactor.

In the utility model, the membrane bioreactor is also provided with a safety cover with four closed surfaces, the safety cover has the function of filtering activated sludge flocs, and the protection membrane bioreactor and the shuttlecock body are prevented from being influenced by large-particle pollutants. When the shuttlecock body is not used, the safety cover can not be installed. The safety cover is 300 ~ 1000mm apart from the outside distance of the brush hair body, and the safety cover adopts ABS, stainless steel or other insulating material's screen cloth to constitute, and the thickness of safety cover is 1 ~ 50mm, and the sieve mesh size of screen cloth is 10 ~ 500 meshes, and highly the same with the height of membrane bioreactor body. The connection between the safety cover and the membrane bioreactor body is detachable, and the safety cover can be taken out independently or not taken out when the membrane is cleaned. The suspended filler is isolated outside the safety shield.

The utility model discloses technical scheme has following advantage:

1. the utility model discloses has set up the flight key body and the helical type suspension filler in membrane bioreactor specially, from the angle analysis of ecosystem organic cycle, has innovatively solved among the current membrane bioreactor that membrane module operating cycle is short, and the membrane pollutes seriously, and the aeration energy consumption is than higher to and the problem that membrane bioreactor dephosphorization effect is relatively poor. The membrane bioreactor body structure is transformed into a more ecological and systematic reaction device with synchronous nitrogen and phosphorus removal functions from a single sewage treatment device for removing organic matters, and is transformed into a self-cleaning membrane bioreactor device with automatic turbulent flow shearing function to slow down membrane pollution.

2. The membrane bioreactor has the advantages of good effluent quality, high organic matter removing efficiency and good denitrification and dephosphorization effects; on the other hand, the membrane cleaning device has the advantages of reducing the membrane pollution problem by more than several times, prolonging the membrane cleaning period, reducing the membrane damage degree and reducing the aeration energy consumption.

3. The membrane bioreactor in the utility model strengthens the material and oxygen mass transfer process between pollutants and sludge by arranging the filament structure on the suspension body, strengthens energy exchange and reduces aeration energy consumption. The suspended filler in the utility model protects the sludge floc from being damaged, so that the membrane bioreactor has better performance in the aspects of degrading organic pollutants and optimizing water quality.

4. The utility model discloses further optimize the structure of suspension, set up helical structure and baffle, specially in the inside miniature "oxygen deficiency" or "anaerobism" environment that forms of helical suspension, cultivate the growth of nitrobacteria, denitrifying bacteria and dephosphorization fungus, strengthened membrane bioreactor's denitrogenation and dephosphorization effect.

5. The utility model is provided with a safety cover with four closed sides at the periphery of the membrane bioreactor body, the safety cover has the function of filtering activated sludge flocs, and the protection membrane bioreactor and the shuttlecock body are prevented from being influenced by large-particle pollutants. The safety cover enables the membrane bioreactor to form an independent treatment system, and a complete ecological circulation system is constructed together with the suspended filler and the activated sludge outside the safety cover.

Drawings

In order to show the product structure of the utility model more clearly, the utility model also provides the following drawings.

Fig. 1 is a schematic view of a cross-sectional structure of a middle flying shuttlecock of the present invention.

Fig. 2 is a schematic structural view of the shuttlecock body installed behind the guide rail plate.

Fig. 3 is a side view of fig. 2.

Fig. 4 is a schematic structural diagram of the suspension packing of the present invention.

Fig. 5 is a schematic view of the internal structure of the suspension packing of the present invention.

Fig. 6 is a top view of fig. 4.

Fig. 7 is a schematic diagram of the structure of a filament.

FIG. 8 is a front view of a membrane bioreactor with a safety shield.

FIG. 9 is a side view of a membrane bioreactor with a safety shield.

FIG. 10 is a top view of a membrane bioreactor with a safety shield.

Fig. 11 is a schematic structural view of a connecting piece of the shuttlecock and a motor.

Description of reference numerals:

1-suspension, 2-filament, 3-shuttlecock, 4-membrane module, 5-safety hood;

11-shell, 12-water inlet and outlet, 13-curved flow channel, 14-clapboard and 15-fastener;

21-void tube, 22-linker;

31-fixed shaft, 32-bristle body, 33-rotating part and 34-motor connecting part.

Detailed Description

The following examples are provided for better understanding of the present invention, and are not limited to the best mode, and do not limit the scope and content of the present invention, and any product that is the same or similar to the present invention, which is obtained by combining the features of the present invention with other prior art or the present invention, falls within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The utility model provides a membrane bioreactor, includes membrane bioreactor body to and a plurality of shuttlecock bodies 3 of flying of installing on membrane bioreactor body, shuttlecock bodies 3 includes: a fixed shaft 31, a bristle body 32, and a rotary member 33, as shown in fig. 1 to 3. Wherein, the bristle body 32 is connected to the fixed shaft 31; a rotating member 33 is provided on the fixed shaft 31 for freely swinging and rotating the bristle body 32.

The membrane bioreactor body of the utility model is additionally provided with the shuttlecock flying body, and the specific structure of the shuttlecock flying body is optimized, and the shuttlecock flying body comprises a fixed shaft, a brush body and a rotating piece; the rotating element is used for enabling the bristle body to swing and rotate freely, namely, the bristle body realizes the functions of rotating, stretching and shaking by 360 degrees around the central axis direction under the action of hydraulic impact or current. The size of the shuttlecock body in the utility model can be set to be smaller, and the hydraulic shearing and cleaning functions can be fully exerted even if the distance between adjacent diaphragms is smaller. Specifically, the shuttlecock can regularly rotate and swing under the combined action of energy gradient and a motor by using the turbulent flow effect and hydraulic energy in the membrane bioreactor body, thereby effectively reducing the sludge deposition phenomenon around the membrane bioreactor body and at the edge of the membrane module 4, prolonging the cleaning period of the membrane module 4, reducing the operation cost and improving the sewage treatment efficiency; meanwhile, the problems of poor fluidity of the local water body of the reactor and poor mass transfer effect are effectively avoided. The middle rotating part 33 of the utility model comprises two rotating bodies, wherein one rotating body is provided with a spherical cavity, and the other rotating body is provided with a sphere matched with the spherical cavity; there are three positions for the rotary member 33 to be disposed between the fixed shaft 31 and the bristle body 32. The first method is as follows: the bristle body 32 is arranged at one end of the fixed shaft 31 through the rotating piece 33, and the other end of the fixed shaft 31 is fixed on the membrane bioreactor body; that is, one of the rotating bodies of the rotating member 33 is fixed to one end of the fixed shaft 31, the other rotating body of the rotating member 33 is fixed to the bristle body 32, and as shown in fig. 1, the other end of the fixed shaft 31 is fixed to the membrane bioreactor body; in use, only the bristle body 32 itself is rotated by the hydraulic force. The second method is as follows: the bristle body 32 is directly fixed on the fixed shaft 31, and the fixed shaft 31 is directly fixed on the membrane bioreactor body through the rotating piece 33; that is, one of the rotating bodies of the rotating member 33 is fixed with one end of the fixed shaft 31, the other end of the fixed shaft 31 is fixed with the bristle body 32, and the other rotating body of the rotating member 33 is fixed with the membrane bioreactor body; in use, the bristle body 32 and the fixed shaft 31 are rotated simultaneously by hydraulic power. The last one is: the rotary member 33 is provided at a middle position of the fixed shaft 31 to divide the fixed shaft 31 into two; that is, one end of one of the fixed shafts 31 is fixed to one of the rotating bodies of the rotating member 33, and the other end of the fixed shaft 31 is fixedly connected to the bristle body 32; one end of the other fixed shaft 31 is fixed with the other rotating body of the rotating element 33, and the other end of the fixed shaft 31 is fixedly connected with the membrane bioreactor body; in use, the bristle body 32 and the fixed shaft 31 adjacent to the corresponding portion of one side of the bristle body 32 are rotated simultaneously by hydraulic force. The first arrangement is preferred in this embodiment, as shown in fig. 1.

The three rotating members 33 may be disposed at the positions where the sphere is engaged with the spherical cavity, or may be disposed at other positions where 360 ° free rotation is achieved, such as a structure similar to a bearing.

Further, a micro motor and a circuit are arranged inside the shuttlecock body 3, and the circuit of the shuttlecock body 3 is linked with a circuit of an aeration fan contained in the membrane bioreactor body; when the circuit of the shuttlecock body 3 is switched on, the shuttlecock body 3 rotates and vibrates according to the set direction; when the circuit of the shuttlecock body 3 is closed, the brush body 32 swings and rotates freely along with the surrounding water flow; carrying out thin film biological reactor on the membrane bioreactor body, wherein the air volume range of an aeration fan on the membrane bioreactor body is 1-100 m/min, the pressure range of the aeration fan is 20-100kPa, and the power range of the aeration fan is 5-100 kW; the power range of a motor arranged inside the shuttlecock body 3 is 1-1000W, and the number of the bristles on the bristle body 32 is 1-20; the shuttlecock bodies 3 positioned on the same row are connected by a series circuit, the shuttlecock bodies 3 positioned on different rows are connected by a parallel circuit, the rotating direction of the shuttlecock bodies is adapted to the flow state of water, and the rotating directions of all the shuttlecock bodies are designed according to the clockwise or anticlockwise direction. The width of the edge of the brush is W as shown in FIG. 1, and the length of the brush in the axial direction is L as shown in FIG. 1. In order to better utilize the hydraulic energy, the utility model discloses the structure and the size and the material of bristle body have further been optimized. The membrane bioreactor comprises a membrane bioreactor body and a bristle body 32, wherein the bristle body 32 comprises a plurality of bristles, one ends of the bristles are connected to a fixed shaft 31, the other ends of the bristles are free ends, the bristles are of sheet structures, the edges of the bristles are of sawtooth structures, the width of the edges of the bristles is 2-20mm, the length of the bristles in the axial direction is 1/10-1/20 of the length of a membrane module 4 in the membrane bioreactor body, and the width of the maximum position of the bristles is 0.5-100 mm in the direction perpendicular to the axial direction of the bristles. That is, in the present embodiment, the shape of the brush is a sheet-like structure like a feather, the length L of the feather-like brush in the axial direction is 1/10 to 1/20 of the length of the membrane module 4, and the maximum width W of the feather-like brush is 0.5 to 100mm, as shown in fig. 1. The included angle formed between the central axis of the fixed shaft 31 extending towards the bristle direction and the bristle axis is 20-90 degrees. The bristle body 32 is made of fluoropolymer, and the fixed shaft 31 is made of silica gel, plastic or metal, such as ABS plastic, stainless steel or copper, which are not easily oxidized and corroded.

In the utility model, a plurality of flying shuttlecock bodies 3 can be fixed on the guide rail plate of the membrane bioreactor body, also can be fixed on the membrane component 4 of the membrane bioreactor body, in particular to be fixed on the membrane bracket of the membrane component 4. When the shuttlecock 3 is fixed on the membrane support of the membrane component 4, as shown in fig. 2 and fig. 3, the shuttlecock is arranged on the central line of the membrane support of the membrane component 4 in a row, the distance between two adjacent shuttlecocks 3 is 100-600 mm, the distance between two adjacent shuttlecocks on the left and right is 1500mm, and each membrane bioreactor body can be provided with 3-100 rows of shuttlecocks. When the shuttlecock 3 is fixed on the membrane component of the membrane bioreactor body, the shuttlecock should be fixed on the stainless steel plate of the membrane component. The fixing mode between the middle flying shuttlecock body 3 and the guide rail plate or the membrane component 4 of the utility model can be a welding, clamping and other connecting and fixing modes.

In order to realize the coordinated control who flies the shuttlecock body, the utility model discloses cite the technique in the patent CN209657108U, a control circuit that is used for eight step motor linkages, the positive and negative moving speed of eight motors of accessible computer software simultaneous control to and the spacing setting of control software or hardware, install eight motors respectively on membrane bioreactor, be used for controlling the rotary motion who flies the shuttlecock body, every eight motors are a set of, and the membrane bioreactor of different specifications can set up the multiunit motor. The specific technical scheme is as follows:

a control circuit for eight stepper motors in linkage comprises a control power supply, a first control circuit, a second control circuit and a control circuit, wherein the input end of the control power supply is connected with an external power supply; the power end of the master controller is connected with the output end of the control power supply; the input ends of the eight drivers are respectively connected with the output end of the main controller, and the output end of each driver is connected with the input end of a stepping motor; and the output end of the linkage control module is connected with the input end of the main controller.

The coordinated control module includes eight signal acquisition circuit, eight signal acquisition circuit connects in parallel, every signal acquisition circuit includes: the drain electrode of the first MOS tube is connected with the input end of a connector, and the source electrode of the first MOS tube is connected with the grounding end; the output end of the AND gate is connected with the grid electrode of the first MOS tube, and the AND gate comprises two input ends; the first input end of the AND gate is respectively connected with the first output end of a limit sensor and the first output end of a rotating speed sensor; the second input end of the AND gate is respectively connected with the second output end of the limit sensor and the second output end of the rotating speed sensor; a NOT gate, said NOT gate being disposed between a first output of said speed sensor and a first input of said AND gate; the output end of the connector is connected with the input end of the main controller.

Preferably, the linkage control module further comprises: the grid electrodes of the second MOS tubes are respectively connected with the grid electrodes of the eight first MOS tubes, the drain electrodes of the second MOS tubes are connected with the output end of the control power supply, and the source electrodes of the second MOS tubes are connected with the grounding end; the first resistor is connected between the grid of the first MOS tube and the grid of the second MOS tube; the second resistor is connected between the grid of the second MOS tube and the grounding end; and the third resistor is connected between the drain electrode of the second MOS tube and a first capacitor. Preferably, the limit sensor and the rotation speed sensor are arranged on the stepping motor.

Preferably, each of the signal acquisition circuits further comprises: a first diode, wherein the anode of the first diode is connected with the grid electrode of the first MOS tube, and the cathode of the first diode is connected with the grid electrode of the second MOS tube; the second diode is connected between the first output end of the limit sensor and the first input end of the AND gate; a third diode connected between the first output terminal of the revolution speed sensor and the first input terminal of the and gate; the fourth diode is connected between the second output end of the limit sensor and the second input end of the AND gate; a fifth diode connected between the second output terminal of the revolution speed sensor and the second input terminal of the and gate; the fourth resistor is connected between the grid electrode of the first MOS tube and the output end of the AND gate; and the fifth resistor is connected between the grid of the first MOS tube and the grounding end. Preferably, the output end of the main controller is respectively connected with the drives of eight stepping motors through eight annular distributors.

The membrane bioreactor body of the utility model is also provided with a suspension filler, and the structure of the suspension filler is optimized in order to achieve better effect, and the structure of the suspension filler is shown in figure 4, and comprises a suspension body 1 and a plurality of filaments 2; one end of the filament 2 is arranged on the outer wall of the suspension body 1, and the other end is a free end; the filaments 2 are used to provide buoyancy and motion support for the suspension 1.

In the utility model, by arranging the filament 2 on the suspension body 1, the suspension body 1 can be effectively provided with buoyancy and movement support through the filament 2, so that the suspension body 1 floats and moves freely in the MBR; the filament 2 moves along with the movement of water flow, so that the energy gradient of hydraulic energy and water impact load is fully utilized to replace aeration energy consumption, and the suspension 1 still can have a better flowing state under the condition of less or no aeration quantity, thereby increasing oxygen mass transfer and reducing aeration energy consumption. Meanwhile, under the condition of high aeration rate, the conventional hard filler destroys sludge flocs in the flowing process to generate a large amount of micro suspension, and the micro suspension is easy to deposit in membrane pores to cause irreversible membrane pollution; the utility model discloses an increase the destroyed degree of mud floc when the filament structure alleviates high aeration volume, greatly practice thrift the membrane cost of trading after being polluted, the effect is showing.

In the utility model, the purpose of the utility model can be satisfied as long as the filament 2 that provides buoyancy and motion support for the suspension body 1 is enough arranged on the outer wall of the suspension body 1, and under the condition, the filament 2 can be irregularly distributed on the outer wall of the suspension body 1 and also can be regularly distributed on the outer wall of the suspension body 1. In order to achieve better floating effect and anti-collision effect and better mass transfer effect, the filament 2 is regularly distributed on the outer wall of the suspension body 1 in this embodiment, specifically: the filament 2 is placed around the suspension 1 for one circle as shown in fig. 4.

In order to achieve a better floating and movement effect, the present invention further defines the dimensional structure of the filament 2 and the suspension 1. The filament 2 is covered on the surface of the suspension body in the embodiment, and the filament 2 has light weight, toughness, elasticity and waterproofness, and has the functions of protecting the suspension body and sludge in the suspension body, preserving heat and suspending. The utility model discloses well filament 2 contains the space pipe 21 of a plurality of end to end connections, and space pipe 21 diameter is about 1 ~ 10mm, and length is about 5 ~ 100 mm. Two adjacent gap pipes 21 are connected into an integral structure through a connecting body 22, the size of the connecting body 22 is 10-100 mm, namely, the distance between two adjacent gap pipes 21 is 10-100 mm, as shown in fig. 7. The material of the connecting body 22 between every two gap pipes 21 is one or more of Polyethylene (PE), polypropylene (PP), Polystyrene (PS), polymethyl methacrylate (PMMA), polyvinyl chloride (PVC), Nylon (Nylon), Polycarbonate (PC), Polyurethane (PU), Polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET, PETE), and the like. The filament 2 fixed to the suspension 1 may have the same or different structure, such as different overall lengths and diameters of the filament 2, different numbers and sizes of the interstitial tubes 21, different materials and sizes of the connecting bodies 22, and the like. In the embodiment, the filaments 2 with different structures are fixed on the suspension body 1, the overall length of the filaments 2 is 50-150 mm, the diameter is 1-10 mm, and the number of the hollow tubes 21 on each filament 2 is 1-20.

The utility model discloses in optimized the size of suspension body 1 simultaneously, this suspension body 1's length scope 10 ~ 100mm promptly, width scope 10 ~ 100mm, curved runner 13 is circular in the suspension body 1, and circular diameter scope is 5 ~ 50 mm. The suspension 1 is made of ABS or PET or fluorine-containing polymer, and in this embodiment, the suspension 1 and the filament 2 are both made of PET. Usually the density of PET material and ABS material can be bigger a bit for water, in order to make its better floating purpose that reaches, the utility model discloses a be equipped with the gas pocket in the PET material and the ABS material that constitute suspension 1 or/and filament 2 and cause it to float in aqueous, be filled with gases such as oxygen, carbon dioxide and nitrogen in the gas pocket, the gas pocket in the filament 2 includes the hole in the space pipe 21.

The utility model discloses well suspension 1's structure can adopt current structure, also can adopt the structure after optimizing. In order to achieve a better load bearing of the activated sludge, and to better create a micro "anoxic" or "anaerobic" environment inside the suspension 1, an optimized suspension 1 is provided in this example. The optimized suspension body 1 comprises a shell 11, a water inlet and outlet 12 and a curved flow passage 13. One end of the curved flow passage 13 is a closed end, and the other end is an open end, the open end is a water inlet/outlet 12, and the water inlet/outlet 12 is arranged on the outer wall of the housing 11. The curved runner 13 of the present invention can be an S-shaped structure, an annular structure, or a spiral structure. In order to better cooperate with the filament 2 to float in the MBR for free movement, the curved flow channel 13 in this embodiment is selected to be a spiral structure, that is, the central axis of the curved flow channel 13 is a spiral line located in the same plane, and the size of the curved flow channel is gradually increased from the closed end to the open end; at the same time, the housing 11 is also provided in a spiral shape, as shown in fig. 4, 5 and 6.

The utility model discloses in, in order to reach the better effect that bears activated sludge, still further inject the structure in the curved runner 13. Namely, the curved flow channel 13 is provided with a partition plate 14 which divides the curved flow channel into a plurality of bearing cavities, the bearing cavities can effectively bear the activated sludge, a circulation port is arranged between the top end of the partition plate 14 and the inner wall of the suspension body 1, the circulation port can ensure that the sewage can flow through all the bearing cavities in the suspension body 1, and the treatment effect of the sewage is improved while the activity of the activated sludge in the bearing cavities is maintained. In order to guarantee simultaneously to bear the weight of the effect of mud and sewage circulation, the utility model discloses the height of median septum 14 is 1/2 ~ 5/6 of the curved runner 13 height of relevant position department, and the whole height of circulation mouth is less than the 1/2 of the curved runner 13 height of relevant position department above the corresponding septum 14 promptly.

In order to achieve better mass transfer effect, the present embodiment further defines the position of the filament 2 regularly arranged on the suspension 1, that is, the plane formed by the filament 2 surrounding the outer wall of the suspension 1 for one circle is parallel to or coincides with the plane of the central axis of the curved flow channel 13 in the suspension 1, as shown in fig. 4-7.

The periphery of the membrane bioreactor body is also provided with a safety cover 5 with four closed surfaces, the safety cover 5 is used for filtering activated sludge flocs, and the membrane bioreactor and the shuttlecock are protected from the influence of large-particle pollutants. The safety cover 5 is 300 ~ 1000mm apart from 3 outside distances of shuttlecock bodies, and safety cover 5 is the screen cloth structure, and its material is ABS, stainless steel or insulating material, and the thickness of safety cover 5 is 1 ~ 50mm, and the sieve mesh size is 10 ~ 500 meshes, and the height of safety cover 5 is the same with the height of membrane bioreactor body. The connection between the safety cover 5 and the membrane bioreactor body 1 is detachable, and the safety cover can be taken out independently or not taken out when the membrane is cleaned; the suspended fillers are isolated outside the safety shield 5 as shown in fig. 8-10. When the shuttlecock body is not used, the safety cover can not be installed.

The membrane bioreactor prepared by the embodiment is used for treating the influent water with the COD of 350mg/L and the NH content₄ ⁺Domestic wastewater with-N of 60-100mg/L, TP of 20-30mg/L, pH of 6.0-7.0 and B/C of 0.5, and the utility model adopts a hydrophilic nano modified blended PVDF membrane. The operation period of the membrane is 5 months, the COD of effluent is lower than 15mg/L, the removal rate of TN is 96 percent, the removal rate of TP is 65 percent, the pH value is 6.0-7.0, the turbidity is 0-0.5NTU, and the actual flux of the membrane is 35-40 LMH.

In order to facilitate the recycling of the membrane bioreactor after use, the shell 11 comprises a lower base body and an upper cover body; the shape and the structure size of the lower base body are matched with those of the upper cover body, and the lower base body and the upper cover body are buckled through a buckling piece 15 to form a curved flow passage 13 in the shell 11. Through the arrangement of the structure, after the membrane bioreactor is used, the interior of the suspension body 1 can be cleaned by detaching the upper cover body, and the suspension body can be recycled after cleaning. The utility model discloses in, on baffle 14 all located down base member 11, and baffle 14 and lower base member 11 between integrated into one piece.

Comparative example 1

The difference between the membrane bioreactor of the embodiment and the embodiment 1 is only that the shuttlecock body 3 is not added on the membrane bioreactor body of the embodiment.

The membrane bioreactor prepared by the embodiment is used for treating the influent water with the COD of 350mg/L and the NH content₄ ⁺Domestic wastewater with-N of 60-100mg/L, TP of 20-30mg/L, pH of 6.0-7.0 and B/C of 0.5, and the utility model adopts a hydrophilic nano modified blended PVDF membrane. The operation period of the membrane is measured to be 3-5 months, the COD of the effluent is 20-30mg/L, the TN removal rate is 90%, the TP removal rate is 60%, the pH is 6-7, the turbidity is 0-0.6NTU, and the actual flux of the membrane is 30-35 LMH.

Comparative example 2

The difference between the present embodiment and embodiment 1 is that the membrane bioreactor body of the present embodiment adopts conventional suspended filler, such as the suspended filler described in CN 207986784.

The membrane bioreactor prepared by the embodiment is used for treating the influent water with the COD of 350mg/L and the NH content₄ ⁺Domestic wastewater with-N of 60-100mg/L, TP of 20-30mg/L, pH of 6.0-7.0 and B/C of 0.5, and the utility model adopts a hydrophilic nano modified blended PVDF membrane. The operation period of the membrane is measured to be 2-3 months, the COD of the effluent is 30-50mg/L, the TN removal rate is 60%, the TP removal rate is 20%, the pH value is 6-7, the turbidity is 0-0.6NTU, and the actual flux of the membrane is 28-30 LMH.

Comparative example 3

The difference between the present embodiment and embodiment 1 is that the membrane bioreactor body of the present embodiment adopts the conventional suspended filler, such as the suspended filler described in CN 207986784; meanwhile, the shuttlecock 3 is not contained.

The membrane bioreactor prepared by the embodiment is used for treating the influent water with the COD of 350mg/L and the NH content₄ ⁺Domestic wastewater with-N of 60-100mg/L, TP of 20-30mg/L, pH of 6.0-7.0 and B/C of 0.5, this exampleThe novel blended PVDF membrane modified by hydrophilic nanometer is adopted. The operation period of the membrane is measured to be 1-3 months, the COD of the effluent is 40-50mg/L, the TN removal rate is 56%, the TP removal rate is 16%, the pH value is 6-9, the turbidity is 0-1.0NTU, and the actual flux of the membrane is 25-28 LMH.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a membrane bioreactor, includes membrane bioreactor body, its characterized in that, includes a plurality of shuttlecock bodies (3) of installing on membrane bioreactor body, shuttlecock body (3) include:

a fixed shaft (31);

a bristle body (32) connected to the fixed shaft (31);

and a rotating member (33) provided on the fixed shaft (31) for freely swinging and rotating the bristle body (32).

2. A membrane bioreactor according to claim 1, wherein the rotary member (33) comprises two rotary bodies, one of which is provided with a spherical cavity and the other of which is provided with a sphere which is engaged with the spherical cavity.

3. A membrane bioreactor according to claim 2, wherein the bristle body (32) is connected to one end of a fixed shaft (31) through a rotary member (33), and the other end of the fixed shaft (31) is fixed on the membrane bioreactor body; one of the rotating bodies of the rotating piece (33) is fixed with the fixed shaft (31), and the other rotating body of the rotating piece (33) is fixed with the brush body (32);

or the bristle body (32) is directly fixed on the fixed shaft (31), and the fixed shaft (31) is fixed on the membrane bioreactor body through the rotating piece (33); one rotating body of the rotating piece (33) is fixed with the fixed shaft (31), and the other rotating body of the rotating piece (33) is fixed with the membrane bioreactor body;

the shuttlecock body (3) is connected with a motor, the fixed shaft (31) is provided with a motor connecting piece (34), and the motor connecting piece (34) is connected with a rotating shaft of the motor; the central axis of the bristle body (32) is parallel to the plane of the guide rail plate of the membrane bioreactor body.

4. A membrane bioreactor according to claim 3, wherein the bristle body (32) comprises a plurality of bristles, one end of the bristles is connected to the fixed shaft (31), and the other end is a free end; the bristles are of a sheet structure, the edges of the bristles are of a sawtooth structure, the width of the edges of the bristles is 2-20mm, the length of the bristles in the axial direction is 1/10-1/20 of the length of a membrane component (4) in the membrane bioreactor body, and the maximum width of the bristles is 0.5-100 mm in the direction perpendicular to the axial direction of the bristles; an included angle formed between the central axis of the fixed shaft (31) extending towards the bristle direction and the axis of the bristles is 20-90 degrees; the brush body (32) is made of fluorine-containing polymer plastic materials, and the fixed shaft (31) is made of silica gel or plastic or ABS or metal materials.

5. A membrane bioreactor according to claim 1, characterized in that several shuttlecocks (3) are fixed on the guide plate or membrane module (4) of the membrane bioreactor body; the distance between two adjacent shuttlecock bodies (3) is 100-600 mm; the distance between two adjacent left and right shuttlecocks is 300-1500mm, and each membrane bioreactor body can be provided with 3-100 rows of shuttlecocks;

the shuttlecock body (3) is internally provided with a micro motor and a circuit, and the circuit of the shuttlecock body (3) is linked with a circuit of an aeration fan contained in the membrane bioreactor body; when the circuit of the shuttlecock body (3) is switched on, the shuttlecock body (3) rotates and vibrates according to the set direction; when the circuit of the shuttlecock body (3) is closed, the brush body (32) swings and rotates freely along with the surrounding water flow; aeration wind on the membrane bioreactor bodyThe air quantity range of the machine is 1-100m³Min, the pressure range of the aeration fan is 20-100kPa, and the power range of the aeration fan is 5-100 kW; the power range of a motor arranged inside the shuttlecock body (3) is 1-1000W, and the number of the bristles on the bristle body (32) is 1-20; the shuttlecocks (3) in the same row are connected by a series circuit, and the shuttlecocks (3) in different rows are connected by a parallel circuit.

6. The membrane bioreactor as claimed in claim 1, wherein the membrane bioreactor body further comprises suspended fillers; the suspension filler comprises a suspension body (1) and a plurality of filaments (2); one end of the filament (2) is arranged on the outer wall of the suspension body (1), and the other end is a free end; the filament (2) is used for providing buoyancy and motion support for the suspension body (1).

7. A membrane bioreactor as claimed in claim 6, characterized in that the suspension (1) has a curved flow channel (13) inside, one end of the curved flow channel (13) is a closed end, the other end is an open end, and the open end is a water inlet/outlet (12); the water inlet and outlet (12) is positioned on the outer wall of the shell (11) of the suspension body (1);

the inner diameter of the curved flow passage (13) is gradually increased from the closed end to the open end; the central axis of the curved flow passage (13) is a spiral line; the spiral lines are positioned on the same plane; the filament (2) is arranged around the outer wall of the suspension body (1) for one circle, and a plane formed by the filament (2) around the outer wall of the suspension body (1) for one circle is parallel to a plane where the spiral line is located.

8. The membrane bioreactor according to claim 7, wherein the curved flow channel (13) is provided with a partition plate (14) for dividing the curved flow channel into a plurality of bearing cavities, and the bearing cavities are used for bearing activated sludge; the height of the partition plate (14) is 1/2-5/6 of the height of the curved flow channel (13) at the corresponding position.

9. The membrane bioreactor according to claim 7, wherein the filament (2) is formed by connecting a plurality of interstitial tubes (21) end to end through connecting bodies (22), the diameter of each interstitial tube (21) is 1-10 mm, the length of each interstitial tube is 5-100 mm, and the length of each connecting body (22) between two adjacent interstitial tubes (21) is 10-100 mm;

the connector is made of one or more of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene and polyethylene terephthalate; the suspension (1) is made of ABS or PET or fluorine-containing polymer material;

the size range of the suspension body (1) is 10-100 mm; the size range of the curved flow passage (13) is 5-50 mm;

the suspension (1) or/and the filament (2) are provided with air holes so that the suspension (1) or/and the filament (2) float in water, and oxygen, carbon dioxide or nitrogen is filled in the air holes.

10. The membrane bioreactor of claim 1, wherein a safety cover with four closed sides is arranged on the periphery of the membrane bioreactor body; the distance between the safety cover and the outermost part of the shuttlecock flying body (3) is 300-1000 mm, the safety cover is of a screen mesh structure and is made of ABS (acrylonitrile butadiene styrene), stainless steel or insulating materials, the thickness of the safety cover is 1-50 mm, the size of a screen mesh is 10-500 meshes, and the height of the safety cover is the same as that of the membrane bioreactor body; the connection between the safety cover and the membrane bioreactor body is detachable.